means The quality of being unwilling to work or expend effort, often paired with a preference for rest or inactivity.

from From "lazy" plus the noun-making suffix "-ness." "Lazy" itself surfaced in English in the 1500s, and its deeper roots are genuinely murky — etymologists shrug a lot here. The leading guess connects it to Middle Low German "lasich" (feeble, slack) or a related Germanic word for weak or limp, possibly tied to "loose." There's also a folk notion linking it to "lay" (as in lying down), which feels right but isn't supported. So the honest answer: a word for doing nothing whose own history can't quite be bothered to explain itself.